-REVISED- VARIOUS INFINITI MODELS; DIAGNOSIS PROCEDURE FOR MIL “ON” DTC P0603 ECM POWER SUPPLY
If you have a vehicle with the MIL “ON” that has a DTC P0603 stored in the ECM:
• Perform the diagnostic steps in this bulletin FIRST.
• This DTC may have been stored due to a series of previous low battery voltage, dead battery or battery terminal disconnections.
• DO NOT perform any other diagnostic procedures or repairs for this code until you have performed the ones in this bulletin.
• See the Service Procedure in this bulletin for further detail.
2004–2010 INFINITI QX56; POWER BACK DOOR WILL NOT OPEN/CLOSE AND MAKES NOISE
While operating the power back door (lift gate),
• The power motor will not open or close the door,
and/or
• There is a grinding and popping noise inside the rear trim panel.